Calais API

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From their site: Reuters run a service called Calais. The Calais web service automatically attaches rich semantic metadata to the content you submit in well under a second. Using natural language processing, machine learning and other methods, Calais categorizes and links your document with entities (people, places, organizations, etc.), facts (person "x" works for company "y"), and events (person "z" was appointed chairman of company "y" on date "x").

The MeaningCloud Text Classification API assigns one or more categories to a text using domain-specific taxonomies. The RESTful API uses GET or POST (POST is recommended) over HTTP/S with returns in...

The MeaningCloud Topics Extraction API extracts relevant information elements from unstructured text. The RESTful API uses GET or POST (POST is recommended) over HTTP/S with returns in JSON and XML....

JGE Automatic Content Generator is a PHP script that will automatically add relevant content to existing web pages. Uses Calais to perform semantic analysis of an existing page's content to find essential keywords and then pull content relevant to these keywords from Freebase.

JGE Automatic Content Generator is a PHP script that will automatically add relevant high quality content to existing web pages. The software performs semantic analysis of the existing page's content to find essential keywords and then pulls content relevant to these keywords from free services. Retrieved articles are then displayed and cached to minimize impact on website's performance.

Skeedy is a free news aggregator. Topics are defined by users themselves. News come from several sources such as youtube, amazon, yahoo news, digg, flickr, etc.. Users can choose between three profiles (Geek, Fan, Calm) to receive more or less news.

Veeeb is a text editor which semantically analyzes your text and provides the most significant concepts. It displays basic info about these concepts and allows you to search in different channels like Flickr, Youtube, Getty, Amazon, Google and so on.

This mashup feeds the semantic web service Calais every five minutes with the most recent tweets behind the current twitter trends in order to determine tags for these trends. With the resulting tag set at your fingertips.